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Federico Cervi and Alberto Tazioli
We compared five regression approaches, namely, ordinary least squares, major axis, reduced major axis, robust, and Prais?Winsten to estimate d18O?d2H relationships in four water types (precipitation, surface water, groundwater collected in wells from lo...
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John A. Luczaj, Amber Konrad, Mark Norfleet and Andrew Schauer
Ground water contamination from septic systems and the application of dairy cattle manure has been a long-standing problem in rural northeastern Wisconsin, especially in areas with thin soils over karstified Silurian dolostone bedrock, where as many as 6...
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Howri Mansurbeg, Ibrahim Mohialdeen, Ali Al-Juboury, Namam Salih, Mohammad Alsuwaidi, Salahadin Shahrokhi, Ihsan Al-Aasm, Rebar Mahmmud and Albert Permanyer
Field observations, together with the results of gas chromatography?mass spectrometry (GC-MS) and stable carbon isotope analysis of bitumen, coupled with fluid inclusion microthermometry and stable isotope analyses of closely associated vug- and fracture...
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Olatunde Samod Durowoju, Mike Butler, Georges-Ivo Ekosse Ekosse and John Ogony Odiyo
Geothermal springs and boreholes within the Soutpansberg Group were sampled and analysed for their major ion chemistry and stable isotope compositions in order to ascertain the possible sources and geochemical processes of the waters. The temperature of ...
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Ziqiang Liu, Xinxiao Yu, Guodong Jia and Dandan Wang
Stable isotopes of oxygen and hydrogen were used to estimate seasonal contributions of precipitation to natural spring recharge in Beijing?s mountainous area. Isotopic compositions were shown to be more positive in the dry season and more negative in the...
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John Bershaw
Deuterium excess (d-excess) is a second-order stable isotope parameter measured in meteoric water to understand both the source of precipitation and the evolution of moisture during transport. However, the interpretation of d-excess patterns in precipita...
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Omed Mustafa, Broder Merkel and Stephan M. Weise
Karst springs of the Makook anticline were investigated to get more insight into the hydrogeologic, hydraulic, and hydrodynamic behavior of this complex karst system. Eight springs were studied in terms of hydrogeochemical constituents as well as d18O an...
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Peipei Zhao, Liangcheng Tan, Pu Zhang, Shengjie Wang, Buli Cui, Dong Li, Gang Xue and Xing Cheng
Based on stable hydrogen and oxygen isotope data (d18O, dD) and meteorological observation data for complete hydrological annual precipitation from 2016 to 2017 in the monsoon marginal region of northern China (Fengxiang and Ningwu), the isotopic charact...
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Daniele Luigi Pinti, Marie Haut-Labourdette, André Poirier, Marion Saby, Vincent J. van Hinsberg, Kim Berlo, Maria Clara Castro, Bjarni Gautason and Ásgerður K. Sigurðardóttir
The determination of the current and past recharge sources, as well as the reconstruction of the timing of the recharge in geothermal reservoirs, is required in order to correctly assess the resource potential of these systems. Theistareykir is a newly d...
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Konstantin W. Scheihing, Claudio E. Moya, Ulrich Struck, Elisabeth Lictevout and Uwe Tröger
A collection of 514 stable isotope water samples from the Atacama Desert is being reassessed geostatistically. The evaluation reveals that adjacent Andean catchments can exhibit distinct d18O and d2H value ranges in meteoric waters, despite similar sampl...
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Xiaomin Gu, Qiulan Zhang, Yali Cui, Jingli Shao, Yong Xiao, Peng Zhang, Jinxing Liu
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In this work, the hydrogeochemistry and environmental isotopic compositions of thermal and mineral springs in Arxan, northeastern China, were used to assess the genesis of the thermal system hosted by deep-seated faults. The reservoir temperature was cal...
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Xiaomin Gu, Qiulan Zhang, Yali Cui, Jingli Shao, Yong Xiao, Peng Zhang and Jinxing Liu
In this work, the hydrogeochemistry and environmental isotopic compositions of thermal and mineral springs in Arxan, northeastern China, were used to assess the genesis of the thermal system hosted by deep-seated faults. The reservoir temperature was cal...
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Xin Lan, Wenxiong Jia, Guofeng Zhu, Yue Zhang, Zhijie Yu and Huifang Luo
Stable isotopes of precipitation play an important role in understanding hydrological and climatic processes of arid inland river basins. In order to better understand the difference of regional water cycle and precipitation patterns, precipitation sampl...
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Tamiru A. Abiye, Molla B. Demlie and Haile Mengistu
A comprehensive assessment of the stable isotope distribution in the groundwater systems of South Africa was conducted in relation to the diversity in the aquifer lithology and corresponding hydraulic characteristics. The stable isotopes of oxygen (18O) ...
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Viorica Nagavciuc, Carmen-Andreea Badalu?a and Monica Ionita
The aim of this study is to investigate the stable isotope composition of precipitation and river water from the northeastern part of Romania. For this study, we collected monthly samples (for variable periods of time) of precipitation from six stations,...
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Seiji Maruyama, Hisaaki Kato
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We examined the oxygen and hydrogen isotopic ratios of surface waters and groundwaters in the catchment of Laguna Lake, Republic of the Philippines, to identify the types of water that combine and control these ratios in the lake water. The oxygen and hy...
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Seiji Maruyama and Hisaaki Kato
We examined the oxygen and hydrogen isotopic ratios of surface waters and groundwaters in the catchment of Laguna Lake, Republic of the Philippines, to identify the types of water that combine and control these ratios in the lake water. The oxygen and hy...
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Caitlin Young, Jonathan B. Martin and Gilbert N. Hanson
Nitrous oxide (N2O) has 265 times greater greenhouse potential than carbon dioxide and its atmospheric concentration has increased by about 20% since industrialization; however, N2O production and emissions from aquatic systems are poorly constrained. To...
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Fernando Gázquez, Ana Monteserín, Christina Obert, Carsten Münker, Ángel Fernández-Cortés and José María Calaforra
Subaqueous gypsum (CaSO4·2H2O) crystals are relatively common in epithermal systems where sulfide ore deposits are present. The Giant Geode of Pulpí (Almería, SE Spain) hosts some of the largest (up to 2 m in length) subaqueous gypsum crystals discovered...
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Ao Zhang, Xinwen Zhao, Jun He, Xuan Huang, Xingyuezi Zhao and Yongbo Zhao
Wuhan has a dense network of rivers and lakes. Due to the city?s development, the water system has been fragmented, the degradation of lakes is becoming increasingly severe, and the eco-environment has been significantly damaged. By collecting samples of...
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